Here is the full list of all 74 Kingdom Rush achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Complete all iron stages.
Complete all heroic stages.
Do not let The Kingpin escape.
Have your Elves deal 10000 points of damage.
Defeat Myconid, the Rotten Fungus.
Kill 25 Shrooms without them poisoning your soldiers.
Defeat Greenmuck and its minions.
Defeat Moloch the Demon Overlord.
Defeat 9 legions before they replicate.
Defeat Lord Blackburn to avoid war between kingdoms.
Discover the hidden monster under water.
Capture the attention of the mysterious crow.
Kill 15 Wererats before they sicken any soldier.
Find the ninja master rat.
Defeat Gul'Thak and its minions.
Earn 45 stars.
Defeat Ulguk-Hai the Troll Warlord.
Find the 5 legendary lost ice-shrooms.
Defeat 10 Troll Pathfinders while they're treading on ice.
Find the elusive acorn.
Defeat Sarelgaz and its minions.
Help Fredo escape.
Complete the campaign in Veteran mode.
Fire the Sunray 20 times.
Summon 5 rock elementals in any one stage.
Change soldiers' rally point 200 times.
Sell 30 towers.
Recruit max elves at The Silveroak Outpost.
Complete the campaign.
Defeat Vez'nan.
Train 1.00 soldiers.
Train a hero up to max level.
Kill 10.000 enemies.
Have your Paladins heal a total of 7.000 life.
Have your Paladins perform 100 Holy Strikes.
Drop 1.000 or more bomblets with the cluster bomb.
Polymorph 50 enemies into sheep.
Snipe 50 enemies.
Shoot 100 missiles.
Hold 500 or more enemies with Wrath of the Forest.
Teleport 250 or more enemies.
Throw 500 or more axes.
Have a single barbarian kill 10 enemies.
Have your soldiers survive the explosion of 300 demons.
Free the sasquatch on the Icewind Pass.
Kill 300 enemies with electricity.
Build 4 Tesla towers in any stage.
Earn 30 stars.
Kill 50 enemies by poison damage.
Send 1.000 soldiers to their deaths.
Disintegrate 50 or more enemies.
Build all 8 towers specializations.
Build 150 towers.
Defeat J.T.
Have your soldiers regenerate a total of 50.000 life.
Build 100 towers.
Kill 2.500 enemies
Defeat The Juggernaut
Have at least 3 Imperial Guards survive in the Citadel.
Kill 100 enemies with meteor showers.
Earn 15 stars.
Sell 5 towers in a single mission.
Call all waves early in a single mission.
Call 10 waves early.
Upgrade all basic tower types to level3.
Use Rain of Fire 5 times in a single stage.
Train a hero up to level 5.
Build 30 towers.
Kill 500 enemies.
Open 5 information cards.
Catch a fish.
Call a wave within 3 seconds of the icon showing up.
Kill 10 or more sheep with your hands.
Kill one enemy.